[drummersince99]

You can put ice in the bottom of the bong but it can crack glass due to quick temperature changes. You can get either a pull carb or a hand carb. it sounds like you want a pull carb where you pull the bowl out instead of holding a hole with your finger. Size is mostly all preference. I would go to a local shop to look at some pieces because you can inspect a piece better in person. Sometimes it hard to tell thickness and quality online